Kate Middleton and Prince William, the Duchess and Duke of Cambridge, kicked off their 9-day tour of south east Asia and the South Pacific on Monday and Middleton's attire fueled speculation that she may be expecting the couple's first child.

The Royal couple visited the world famous Botanical Gardens in Singapore where they spent time viewing the Dendrobium Memoria Orchid, which was named after the late Princess Diana. Middleton opted to wear a loose fitting kimono-style pink dress featuring an orchid pattern by British designer Jenny Packham, fueling rumors that she may be pregnant.

"Friends say Kate is convinced it's happened, and while she and William are keeping the news close to the vest, they're delirious with joy," a source recently told Star magazine.

"A woman can always tell when the earliest signs appear, and it's believe that a passionate night together at their rented country house on an estate in Wales, just after the end of the London Olympics, did the trick," the insider added.

During their visit to the Botanical Gardens, the couple had a pink and white hybrid orchid named after them. The "Vanda William Catherine" is a free-flowering orchid hybrid which is said to be in honor of their 1-year marriage.

The pair smiled and appeared to be in good spirits as they strolled through the serene garden, and while they engaged in some conversation there was no mention of an alleged pregnancy.

They are said to be taking extra precaution since Middleton, 30, is allegedly in early stages of pregnancy and they are reportedly holding off making a formal announcement to ensure the baby's wellbeing.

"It would be formally through the palace press office, but only after the royal gynecologist is absolutely convinced that Kate is in peak condition," the source said.